Revert of Add best-effort/allow rollback flags on WorkItem.

chrome/installer/util/conditional_work_item_list.cc

Index: chrome/installer/util/conditional_work_item_list.cc
diff --git a/chrome/installer/util/conditional_work_item_list.cc b/chrome/installer/util/conditional_work_item_list.cc
index d3495e3c1e713553722eaf4b265b4d72b95f78a0..fcf195584bc3b30881b0bd3972e8218914ee188f 100644
--- a/chrome/installer/util/conditional_work_item_list.cc
+++ b/chrome/installer/util/conditional_work_item_list.cc
@@ -13,20 +13,20 @@
 
 ConditionalWorkItemList::~ConditionalWorkItemList() {}
 
-bool ConditionalWorkItemList::DoImpl() {
+bool ConditionalWorkItemList::Do() {
   VLOG(1) << "Evaluating " << log_message_ << " condition...";
   if (condition_.get() && condition_->ShouldRun()) {
     VLOG(1) << "Beginning conditional work item list";
-    return WorkItemList::DoImpl();
+    return WorkItemList::Do();
   }
   VLOG(1) << "No work to do in condition work item list "
           << log_message_;
   return true;
 }
 
-void ConditionalWorkItemList::RollbackImpl() {
+void ConditionalWorkItemList::Rollback() {
   VLOG(1) << "Rolling back conditional list " << log_message_;
-  WorkItemList::RollbackImpl();
+  WorkItemList::Rollback();
 }
 
 // Pre-defined conditions: